'The Avengers' actress hinted she quit her role as an ambassador for Oxfam after eight years last month because she didn't want her image to be controlled by a "global platform."

The 29-year-old star told Dazed magazine: "I don't see myself as being a role model; I never wanted to step into those shoes."

Scarlett sparked controversy when she chose to step away from the anti-poverty organization, which opposes all trade from Israeli settlements, in favor of continuing her relationship with SodaStream, which has a factory in the country's West Bank, and appeared in a Super Bowl ad to promote the fizzy drink firm last month.

Although the actress didn't directly discuss her fallout with the charity, she said: "How could I wake up every day and be a normal person if I was completely aware that my image was being manipulated on a global platform. How could I sleep?

"You have to have peace of mind. You've got to be able to protect those things. How else could you exist? You'd go crazy, anybody would go crazy."

The 'Her' star's spokesperson released a statement following her split from Oxfam that said: "Scarlett Johansson has respectfully decided to end her ambassador role with Oxfam after eight years.

"She and Oxfam have a fundamental difference of opinion in regards to the boycott, divestment and sanctions movement. She is very proud of her accomplishments and fundraising efforts during her tenure with Oxfam."